It's great that you brought up projected starters and key backups signed, because we have barely half of our starters under contract next year. We're going to have to rebuild our entire WR corps outside of DHop unless you want to count on Isabella and Johnson for anything. We're going to have to rebuild our entire CB corps outside of Murphy. We'll have to rebuild our entire RB corps outside of Eno Benjamin who is no lock to even make the team this year. We'll need to rebuild the TE corps from the ground up. We'll need to replace or re-sign Chandler Jones. Kyler will be asking for an extension. We'll need a backup QB. I'm even being friendly and assuming Jones or Murray will be starters at RG.
...and that's outside of trying to upgrade anywhere. And come 2023, we have 8 total players under contract.
Considering Keim's draft record, the vast majority of these spots will have to be filled by free agents. The well isn't as deep as you think it is.
See above.